Elements and Compounds

It consists of only one kind of atom which cannot be broken down into simpler substances.

• atom

• element

• compound

• molecules

Is sugar (C₁₂H₂₂O₁₁) an element or a compound?

• Element
• Compound

Tags

NGSS.MS-PS1-1

It consists of two or more kinds of atoms.

• mixture

• substance

• element

• compound

Which of the following is not a compound?

• HCl
• Cl
• NaCl
• CO2

Tags

NGSS.MS-PS1-1

Which of the following represents an element?

• H₂O
• H₂
• NaCl
• CaCO₃

Tags

NGSS.MS-PS1-1

Which of the following could be a symbol on the periodic table of elements?

• CA

• ca

• Ca

• CAz

Salt water boils and the water completely evaporates, salt (NaCl) is left in the bottom of the beaker. Which of the following is left in the beaker?

• Compound
• Element
• Mixture
• None of the Above

Tags

NGSS.MS-PS1-4

How many elements are represented in the compound?
Na₂CO₃

• 1
• 2
• 3
• 4

Tags

NGSS.MS-PS1-1

The elements are classified into metals, nonmetals and colloids

• True

• False

Which is the correct symbol for sulfur?

• S

• s

• su

• SU